Revision: miles@gnu.org--gnu-2005/emacs--cvs-trunk--0--patch-145

(make-text-button): Default button type if not specified

2005-03-02  Miles Bader  <miles@gnu.org>

   * lisp/button.el (make-text-button): If the user doesn't specify a
   type, use the default.  Rewrite to use `add-text-properties' and
   plist functions.

2 files changed, 24 insertions, 19 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 56097bb2ccc..01fb5a5e6b4 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2005-03-02  Miles Bader  <miles@gnu.org>
+
+        * button.el (make-text-button): If the user doesn't specify a
+        type, use the default.  Rewrite to use `add-text-properties' and
+        plist functions.
+
 2005-03-01  Robert J. Chassell  <bob@rattlesnake.com>
 
         * textmodes/texinfmt.el: (texinfo-no-refill-regexp): Comment out
diff --git a/lisp/button.el b/lisp/button.el
index 5f9b5094e6c..78008f06db2 100644
--- a/lisp/button.el
+++ b/lisp/button.el
@@ -1,6 +1,6 @@
 ;;; button.el --- clickable buttons
 ;;
-;; Copyright (C) 2001 Free Software Foundation, Inc.
+;; Copyright (C) 2001, 2005 Free Software Foundation, Inc.
 ;;
 ;; Author: Miles Bader <miles@gnu.org>
 ;; Keywords: extensions
@@ -298,24 +298,23 @@ large numbers of buttons can also be somewhat faster using
 `make-text-button'.
 
 Also see `insert-text-button'."
-  (let (prop val)
-    (while properties
-      (setq prop (pop properties))
-      (setq val (pop properties))
-      ;; Note that all the following code is basically equivalent to
-      ;; `button-put', but we can do it much more efficiently since we
-      ;; already have BEG and END.
-      (cond ((memq prop '(type :type))
-             ;; We translate a `type' property into a `category'
-             ;; property, since that's what's actually used by
-             ;; text-properties for inheritance.
-             (setq prop 'category)
-             (setq val (button-category-symbol val)))
-            ((eq prop 'category)
-             ;; Disallow setting the `category' property directly.
-             (error "Button `category' property may not be set directly")))
-      ;; Add the property.
-      (put-text-property beg end prop val)))
+  (let ((type-entry
+         (or (plist-member properties 'type)
+             (plist-member properties :type))))
+    ;; Disallow setting the `category' property directly.
+    (when (plist-get properties 'category)
+      (error "Button `category' property may not be set directly"))
+    (if (null type-entry)
+        ;; The user didn't specify a `type' property, use the default.
+        (setq properties (cons 'category (cons 'default-button properties)))
+      ;; The user did specify a `type' property.  Translate it into a
+      ;; `category' property, which is what's actually used by
+      ;; text-properties for inheritance.
+      (setcar type-entry 'category)
+      (setcar (cdr type-entry)
+              (button-category-symbol (car (cdr type-entry))))))
+  ;; Now add all the text properties at once
+  (add-text-properties beg end properties)
   ;; Return something that can be used to get at the button.
   beg)